The Four Truths of Digital:
Truth One: DSD is a 4-8 bit recording system, not 1. This means it gets decimated and oversampled - two things the scheme was trying to avoid in the first place.
Truth Two: 16-bit "audiophile" CDs contain 20-bit level resolution and have since 1993.
Truth Three: The limit of human hearing is 20-bit level resolution.
Truth Four: Digital is hundreds of times lower in distortion vs. analog...but its distortions are spread out spectrally and are hard to pin down. They are removing these, at last, in the latest playback gear.